On Tuesday, more than 2½ years after her husband’s death, Chen gave birth to their daughter, Angelina, at New York-Presbyterian Hospital.

On the night her husband was shot, Chen asked that his semen be preserved with the hope of one day having their child, according to a New York City Police Department announcement that included a photo of the new mother and baby Angelina wearing an NYPD knit cap.

Liu’s mother, Xiu Yan Li, said, “The past three years have been the most difficult. This is the best news we’ve gotten.”

Chen, who goes by Sanny, said she dreamt that she would have a daughter.

“I told my friend, ‘It’s going to be a baby girl,’ she said. “My friend said, ‘No, you haven’t even checked the sonograms,’ but I was right!”

Chen had recently married Liu when he was fatally shot in Bedford-Stuyvesant by gunman Ismaaiyl Brinsley, who would soon take his own life.

“She didn’t want to break her family’s hearts if it wasn’t successful,” Susan Zhuang, a family friend, told Newsday.

“The parents were very emotional, crying and holding the baby,” Chen’s friend Maria Dziergowski told the New York Post.

Liu’s mother told the New York Daily News that the baby “looks like my daughter-in-law. But this part, the eyes and the forehead, looks like my son. The top of the face looks like my son. The bottom looks like her mother. The head looks exactly like my son.

“I see my son in her.”

She told Newsday that the family plans to take the baby to visit Liu’s grave when she’s a month old.